—Your colleague's spoken English is beautiful, Lily．
—It's no wonder．She ____ in the USA for a year as a visiting professor．
| A．worked | B．has worked | C．had worked | D．has been working |
________ all the homework assigned by the school, the students have to work at it till midnight.
| A．Completing | B．To complete |
| C．Having completed | D．To have completed |
________ in the countryside made Mr. Wilson very hardworking when he was very young.
| A．Bringing up | B．Having brought up |
| C．Being brought up | D．Brought up |
—The cars give off a great deal of waste gas in the streets.
—Yes. But I'm sure something will be done to ________ air pollution.
| A．reduce | B．remove |
| C．collect | D．warn |
It's a headache trying to ________ in a strange, new town. I will just take a taxi and avoid all the trouble.
| A．settle down | B．work out |
| C．get around | D．hold out |
Many people headed for the water to ________， including rivers, bays in the seaside of the country.
| A．put off | B．cut off |
| C．pull off | D．cool off |